Toshiba 2060 Service Handbook page 33

[A] Adjustment and detection of separation output of high-voltage transformer
Pockmarks and defective paper separation may be caused by various other reasons as well as poor
adjustment of the separation output. So, make the following checks before starting to adjust the separa-
tion output.
[B] Items to check before adjustment
(1) Charger wires
(2) Developer unit
(3) Toner density in the developer unit
(4) Copy paper and paper feeding
[C] Output adjustment procedure
Caution:
• When pockmarks occur:
When pockmarks (irregularities) are generated on the halftone areas, reduce the output in accord
ance with the adjustment procedure described on the next page.
Note: Do not reduce the output excessively. Otherwise, the separation ability will decrease.
• Defective separation:
When defective paper separation occurs despite the charger wires being clean, or when the user
is likely to use a large quantity of thin paper, raise the output in accordance with the adjustment
procedure described on the next page.
Note: Do not increase the output excessively, otherwise pockmarks will be generated and the
separation ability will decrease.
• When developer bias output is adjusted:
If backgrounding occurs over the entire copy with no under-exposure conditions, increase the bias
output. However, increasing it excessively would result in poor image contrast, bias leakage or
adherence of carrier powder to the drum surface.
2060, 2860/70 ADJUSTMENT
(5) Aligning roller rotation
(6) Main charger output
(7) Transfer charger output
(8) Developer bias output
1 - 30 Dec. 1996 © TOSHIBA CORP.